waecmaths question:
In $\Delta XYZ$ $\left| XY \right|=8cm,$$\left| YZ \right|=10cm$and $\left| XZ \right|=6cm$ which of theses relations is true?
Option A:
$\left| XY \right|+\left| YZ \right|=\left| XZ \right|$
Option B:
$\left| XY \right|-\left| YZ \right|=\left| XZ \right|$
Option C:
${{\left| XZ \right|}^{2}}={{\left| YZ \right|}^{2}}-{{\left| XY \right|}^{2}}$
Option D:
${{\left| YZ \right|}^{2}}={{\left| XZ \right|}^{2}}-{{\left| XY \right|}^{2}}$
waecmaths solution:
Option C
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